Position indicator for downhole tool

Details Position indicator for downhole tool Position indicator for downhole tool

1977-05-16

1978-10-24

Purser, Ernest R.

Wells

With electrical means

Valve

166255, 175 45, E21B 4300

Patent

active

041216571

ABSTRACT:
Apparatus is disclosed to indicate at the surface when a tool lowered into a well bore on an electric cable is properly positioned in a downhole housing. The tool has a key slot and a muleshoe is carried by the tool to engage a key located on the housing and to guide the key into the key slot to properly position the tool. A sensing coil is carried by the tool and positioned for its magnetic field to pass through the key slot. Circuit means monitor the magnetic field and indicate at the surface when the key has been properly positioned in the slot.

REFERENCES:
patent: 3052309 (1962-09-01), Eastman
patent: 3414071 (1968-12-01), Alberts
patent: 3434046 (1969-03-01), Wilson et al.
patent: 3465836 (1969-09-01), Fields
patent: 3656562 (1972-04-01), Baugh

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